#ifndef  __SPACEDEFENDER_OBSERVER_H_
#define __SPACEDEFENDER_OBSERVER_H_

namespace spacedefender
{

class Subject;

class Observer
{
	public:
		Observer(void);
		virtual ~Observer(void);
		virtual void Notification(const Subject* sender) = 0;
};

}
#endif // __SPACEDEFENDER_OBSERVER_H_
